<template>
  <div class="list" ref="wrapper">
    <div>
      <div class="area">
        <div class="title border-topbottom">当前城市</div>
        <div class="button-list">
          <div class="button-wrapper">
            <div class="button">{{ this.$store.state.city }}</div>
          </div>
        </div>
      </div>
      <div class="area">
        <div class="title border-topbottom">热门城市</div>
        <div class="button-list">
          <div
            class="button-wrapper"
            v-for="item of hot"
            :key="item.id"
            @click="handleCityClick(item.name)"
          >
            <div class="button">{{ item.name }}</div>
          </div>
        </div>
      </div>
      <!-- 控制点击滚动到某个区域 动态的ref -->
      <div class="area" v-for="(item, key) of cities" :key="key" :ref="key">
        <div class="title border-topbottom">{{ key }}</div>
        <div class="item-list">
          <div
            class="item border-topbottom"
            v-for="(innerItem, i) of item"
            :key="i"
            @click="handleCityClick(innerItem.name)"
          >
            {{ innerItem.name }}
          </div>
        </div>
      </div>
    </div>
  </div>
</template>

<script>
import Bscroll from "better-scroll";
import { mapMutations } from "vuex";
import { cities } from "./data.js";
export default {
  name: "CityList",
  props: {
    // hot: Array,
    letter: String,
    // cities: Object,
  },
  data() {
    return {
      cities: cities,
      hot: [
        {
          id: 1,
          spell: "beijing",
          name: "北京",
        },
        {
          id: 3,
          spell: "shanghai",
          name: "上海",
        },
        {
          id: 47,
          spell: "xian",
          name: "西安",
        },
        {
          id: 239,
          spell: "sanya",
          name: "三亚",
        },
        {
          id: 188,
          spell: "lijiang",
          name: "丽江",
        },
        {
          id: 125,
          spell: "guilin",
          name: "桂林",
        },
      ],
    };
  },
  mounted() {
    this.scroll = new Bscroll(this.$refs.wrapper, { click: true });
  },
  watch: {
    letter() {
      if (this.letter) {
        const element = this.$refs[this.letter][0];
        // 进行滚动
        this.scroll.scrollToElement(element, 500);
      }
    },
  },
  methods: {
    ...mapMutations(["changeCity"]),
    handleCityClick(city) {
      this.changeCity(city);
      this.$router.push("/");
    },
    
  },
};
</script>

<style lang="stylus" scoped>
@import '@/assets/styles/varibles.styl'
.border-topbottom
  &:before
    border-color: #ccc
  &:after
    border-color: #ccc
.border-bottom
  &:before
    border-color: #ccc
.list
  overflow: hidden
  position: absolute
  top: 1.58rem
  left: 0
  right: 0
  bottom: 0
  .title
    line-height: .54rem
    background: #eee
    padding-left: .2rem
    color: #666
    font-size: .26rem
  .button-list
    overflow: hidden
    padding: .1rem .6rem .1rem .1rem
    .button-wrapper
      float: left
      width: 33.33%
      .button
        margin: .1rem
        padding: .1rem 0
        text-align: center
        border: .02rem solid #ccc
        border-radius: .06rem
  .item-list
    .item
      line-height: .76rem
      padding-left: .2rem
</style>
